John, you should really discuss license topics on legal-talk and not here.
To give the briefest of responses:
I don't see anything to prevent this from happening.
Merging a future ODbL-licensed OSM with a (then) old CC-BY-SA licensed OSM dataset and publishing tiles made from that database would force you to release the whole database under ODbL which would violate the terms of CC-BY-SA.
There are ways in which data could legally be combined but that's really going too much into detail for talk.
Bye Frederik -- Frederik Ramm ## eMail frede...@remote.org ## N49°00'09" E008°23'33" _______________________________________________ legal-talk mailing list legal-talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/legal-talk
